Ultralow Ion Migration and X‐Ray Response from Strong Dipole Moments in (Br‐EA)2PbBr4 Perovskite Single Crystals DOI
Haibin Li, Wei Jiang,

Jiarui Wu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract 2D hybrid perovskites composed of quantum‐well structures demonstrate immense potential in optoelectronics because their unique combination environmental stability and optoelectrical properties. However, improving electrical properties via engineering results severe ion migration inferior chemical stability. In this study, a novel strategy to avoid the above trade‐off between for modifying electric field profile through molecular design is proposed. To end, ethylammonium (EA) cations are substituted with 2‐bromoethylamine (Br‐EA) fabricate pure perovskite 2 PbBr 4 single crystals. The dipole moments Br‐EA induced impart several features X‐ray response, including ferro‐response current, reverse super‐high V oc 95 V. resulting detectors achieve sensitivity 540.7 µC Gy air −1 cm −2 an extra 38.1% gained from local dipoles, impressive limit detection 9.8 nGy s , ultralow dark current drift 3.69 × 10 −8 nA at −100 This study presents valuable insights into effects A‐site on materials inspires further exploration applications.

Language: Английский

Ultra‐stable and Sensitive X‐ray Detectors Using 3D Hybrid Perovskitoid Single Crystals DOI Open Access

XU Li-jun,

Daohua Wang,

Huang Ye

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Organic–inorganic hybrid perovskites (OIHPs) have shown great potential for direct X‐ray detection in security screening and medical diagnostics. However, their humidity stability is compromised due to the susceptibility of structural components water molecules, thereby limiting practical application. In this work, stable sensitive achieved using high‐quality bulk single crystals 3D perovskitoid (DMPZ)Pb 2 Br 6 ( DPB , DMPZ = N ′‐dimethyl‐pyrazinium), wherein ‐acid protons are replaced with hydrophobic alkyl groups. Notably, maintain phase after 60 days immersion at room temperature, demonstrating significant moisture‐stable detectors. Based on detectors successfully fabricated, achieving a high sensitivity 6437.2 µC Gy air −1 cm −2 70 V bias limit low 46.7 nGy s outperforming most low‐dimensional perovskite Most strikingly, retain 79.6% initial 14 immersion, highlighting exceptional moisture stability. This work first construct high‐performance crystals, advancing development detection.

Language: Английский

Citations

0
Ultralow Ion Migration and X‐Ray Response from Strong Dipole Moments in (Br‐EA)2PbBr4 Perovskite Single Crystals DOI
Haibin Li, Wei Jiang,

Jiarui Wu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract 2D hybrid perovskites composed of quantum‐well structures demonstrate immense potential in optoelectronics because their unique combination environmental stability and optoelectrical properties. However, improving electrical properties via engineering results severe ion migration inferior chemical stability. In this study, a novel strategy to avoid the above trade‐off between for modifying electric field profile through molecular design is proposed. To end, ethylammonium (EA) cations are substituted with 2‐bromoethylamine (Br‐EA) fabricate pure perovskite 2 PbBr 4 single crystals. The dipole moments Br‐EA induced impart several features X‐ray response, including ferro‐response current, reverse super‐high V oc 95 V. resulting detectors achieve sensitivity 540.7 µC Gy air −1 cm −2 an extra 38.1% gained from local dipoles, impressive limit detection 9.8 nGy s , ultralow dark current drift 3.69 × 10 −8 nA at −100 This study presents valuable insights into effects A‐site on materials inspires further exploration applications.

Language: Английский

Citations

1